arm: apple: Add Apple M3 (t8122) support

Apple's M3 SoC is similar to M1 and M2 but uses a different memory map.
The main difference is that RAM starts at 0x100_0000_0000 like on t600x
and t602x (M1 and M2 Pro/Max/Ultra). Otherwise IO blocks have been
rearranged.
U-boot's existing drivers are compatible with the hardware and M3 device
trees will carry "apple,t8103-*" compatible strings. Only
apple-atcphy-reset might need a new compatible due to USB4 / DisplayPort
changes the Linux driver has to deal with.

Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Mark Kettenis <kettenis@openbsd.org>

diff --git a/arch/arm/mach-apple/board.c b/arch/arm/mach-apple/board.c
index 4cd8979bdc20ee0b172d08f14b8a63491add90bd..20054f540890157460b7ebec7efcadd09d216fbf 100644 (file)
--- a/arch/arm/mach-apple/board.c
+++ b/arch/arm/mach-apple/board.c
@@ -673,6 +673,83 @@ static struct mm_region t6022_mem_map[] = {
        }
 };
 
+/* Apple M3 */
+
+static struct mm_region t8122_mem_map[] = {
+       {
+               /* I/O */
+               .virt = 0x200000000,
+               .phys = 0x200000000,
+               .size = 4UL * SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* NVMe */
+               .virt = 0x300000000,
+               .phys = 0x300000000,
+               .size = SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* PCIE */
+               .virt = 0x580000000,
+               .phys = 0x580000000,
+               .size = SZ_512M,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* PCIE */
+               .virt = 0x5a0000000,
+               .phys = 0x5a0000000,
+               .size = SZ_512M,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) |
+                        PTE_BLOCK_INNER_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* PCIE */
+               .virt = 0x5c0000000,
+               .phys = 0x5c0000000,
+               .size = SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) |
+                        PTE_BLOCK_INNER_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* I/O ATC0 */
+               .virt = 0x700000000,
+               .phys = 0x700000000,
+               .size = SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* I/O ATC1 */
+               .virt = 0xb00000000,
+               .phys = 0xb00000000,
+               .size = SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* RAM */
+               .virt = 0x10000000000,
+               .phys = 0x10000000000,
+               .size = 8UL * SZ_1G,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+                        PTE_BLOCK_INNER_SHARE
+       }, {
+               /* Framebuffer */
+               .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL_NC) |
+                        PTE_BLOCK_INNER_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
+               /* List terminator */
+               0,
+       }
+};
+
 struct mm_region *mem_map;
 
 int board_init(void)
@@ -720,6 +797,8 @@ void build_mem_map(void)
                mem_map = t6020_mem_map;
        else if (of_machine_is_compatible("apple,t6022"))
                mem_map = t6022_mem_map;
+       else if (of_machine_is_compatible("apple,t8122"))
+               mem_map = t8122_mem_map;
        else
                panic("Unsupported SoC\n");